newtoleica Posted January 24, 2021 Share #1 Posted January 24, 2021 Advertisement (gone after registration) Just popped out in the snow for an hour, around 0 Celsius. I was using the Q2 and its fine as it was getting a bit wet. Thought I'd take a couple of shots with the M7, which I bought privately last week. Took it out of the bag, the battery dot was flashing. One shot and the display went blank. Got it home changed the two batteries to 4 x SR44 (fresh). No luck. Tested the existing batteries and the SR44s in my OM3 and all fine. Rubbed them with cloth, refitted both combinations. No luck. Any suggestions? It didn't get wet, just a couple of drops. Link to post Share on other sites More sharing options...
Advertisement Posted January 24, 2021 Posted January 24, 2021 Hi newtoleica, Take a look here M7 just died?. I'm sure you'll find what you were looking for!
Keith (M) Posted January 24, 2021 Share #2 Posted January 24, 2021 Might be worth have a very close look at the contacts in the battery chamber and if nothing visually amiss, give them a gentle clean. 1 Link to post Share on other sites More sharing options...
newtoleica Posted January 24, 2021 Author Share #3 Posted January 24, 2021 Thanks, that seems to have fixed it! 2 Link to post Share on other sites More sharing options...
Matlock Posted January 24, 2021 Share #4 Posted January 24, 2021 1 hour ago, newtoleica said: Just popped out in the snow for an hour, around 0 Celsius. I was using the Q2 and its fine as it was getting a bit wet. Thought I'd take a couple of shots with the M7, which I bought privately last week. Took it out of the bag, the battery dot was flashing. One shot and the display went blank. Got it home changed the two batteries to 4 x SR44 (fresh). No luck. Tested the existing batteries and the SR44s in my OM3 and all fine. Rubbed them with cloth, refitted both combinations. No luck. Any suggestions? It didn't get wet, just a couple of drops. Whilst it may have no bearing in this case, SR44s are not a good idea. Far better to use 2 x DL1/3N. 1 Link to post Share on other sites More sharing options...
BradS Posted January 24, 2021 Share #5 Posted January 24, 2021 59 minutes ago, Matlock said: Whilst it may have no bearing in this case, SR44s are not a good idea. Far better to use 2 x DL1/3N. Why? Link to post Share on other sites More sharing options...
Matlock Posted January 24, 2021 Share #6 Posted January 24, 2021 50 minutes ago, BradS said: Why? SR44 are alkaline which can oxidize and cause contact problems. DL1/3Ns are lithium which do not have that problem. Leica do not recommend SR44s Link to post Share on other sites More sharing options...
a.noctilux Posted January 24, 2021 Share #7 Posted January 24, 2021 Advertisement (gone after registration) 10 minutes ago, Matlock said: SR44 are alkaline which can oxidize and cause contact problems. DL1/3Ns are lithium which do not have that problem. Leica do not recommend SR44s SR are silver oxide see Maxell LR are alcaline ... if possible, I use lithium cell with benefit of long storage life good also to have 2fold less contacts. 1 Link to post Share on other sites More sharing options...
Matlock Posted January 24, 2021 Share #8 Posted January 24, 2021 You are correct of course, my mistake. but SR are rather difficult to get hold of and why use 4 SR44s when 2 DL1/3Ns are the recommended batteries. m Link to post Share on other sites More sharing options...
BradS Posted January 24, 2021 Share #9 Posted January 24, 2021 (edited) 1 hour ago, Matlock said: SR44 are alkaline which can oxidize and cause contact problems. DL1/3Ns are lithium which do not have that problem. Leica do not recommend SR44s Well, yes, of course. One should not use Alkaline cells in any camera except in dire emergencies and then only until proper silver oxide or better yet, lithium cells can be found (but as already discussed, SR44 are not alkaline. The LR44 are alkaline). Thankfully, silver oxide button cells are actually far more common locally than alkaline now days. The Duracell 357 and Energizer EPX76 silver oxide cells are common and relatively inexpensive Edited January 24, 2021 by BradS Link to post Share on other sites More sharing options...
Matlock Posted January 24, 2021 Share #10 Posted January 24, 2021 1 hour ago, BradS said: Thankfully, silver oxide button cells are actually far more common locally than alkaline now days. The Duracell 357 and Energizer EPX76 silver oxide cells are common and relatively inexpensive Sadly, whilst Duracell 357 and Energizer EPX76 are indeed available in the UK they are fairly hard to come by and if you type in those two types the result all too often comes up as LR44. This is quite relevant as the OP is from London. Link to post Share on other sites More sharing options...
newtoleica Posted January 24, 2021 Author Share #11 Posted January 24, 2021 You can get SR44 357 batteries on eBay from a specialist watch battery seller. I have a fair stash for my OM cameras, so will use this in the M7. Link to post Share on other sites More sharing options...
Matlock Posted January 24, 2021 Share #12 Posted January 24, 2021 3 minutes ago, newtoleica said: You can get SR44 357 batteries on eBay from a specialist watch battery seller. I have a fair stash for my OM cameras, so will use this in the M7. That is true but make sure they are indeed SR44 and not LR44. Link to post Share on other sites More sharing options...
newtoleica Posted January 24, 2021 Author Share #13 Posted January 24, 2021 8 minutes ago, Matlock said: That is true but make sure they are indeed SR44 and not LR44. Been buying from the same seller for years. Link to post Share on other sites More sharing options...
Matlock Posted January 24, 2021 Share #14 Posted January 24, 2021 10 minutes ago, newtoleica said: Been buying from the same seller for years. In that case you have no problem, it is always best to buy from a seller you trust. However I will reiterate that Leica does not recommend SR44s for use in the M7. Link to post Share on other sites More sharing options...
a.noctilux Posted January 24, 2021 Share #15 Posted January 24, 2021 Out of curiosity, as I don't have M7, I had a look at the M7's user manual on line. I confirm Peter Matlock above: in the manual, only batteries mention tension 6V "2x type DL 1/3N lithium", that's all nothing concerning silver batteries. Link to post Share on other sites More sharing options...
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